Światowit • LVII • 2018 207 Krzysztof Misiewicz Institut d’Archéologie, Université de Varsovie kmisiewicz@uw.edu.pl Jamel Hajji Institut National du Patrimoine, Tunisie jamelhajji@hotmail.fr Tomasz Waliszewski Institut d’Archéologie, Université de Varsovie twaliszewski@uw.edu.pl PROSPECTIONS NON INVASIVES SUR LE SITE DE MUSTIS/MUSTI (EL KRIB) EN TUNISIE Abstract Non-invasive Prospections on the Mustis/Musti (El Krib) Site in Tunisia The objective of the frst step of the non-invasive survey carried out on the Mustis site described herein was to verify the possibility of locating archaeological remains and to detect the location of the supposed remains by geo- physical measurements (magnetic and electric methods). Magnetic measurements were made with Geometrics G-858 Cesium magnetometer with two probes located on the same horizontal level at 0.5 m distance or on the same vertical level at 0.5 m and 0.75 m above the ground level. Te instrument recorded the values of the total vector of the magnetic feld strength and made it pos- sible to calculate the pseudo-gradient of its components (horizontal or vertical). Electric measurements were made by means of axial dipole-dipole electrode confgu- rations (parallel) with AB current electrodes with spacing of one metre and electrodes of potential MN (identical spacing) at equal distance D at 4 and 6 metres, which made it possible to record values of apparent resistivity of the subsoil, with the penetration depth of the current of c. 2.0 and 3.5 m, respectively, below the current ground level. At the time of the data interpretation, the suspected locations of the remains causing the anomalies were indi- cated by means of dashes of diferent colours and thick- nesses (depending on the assumed depth of the struc- tures). Tese indications, transferred on maps, can serve as a starting point for extensive analyses of the entire site and its surrounding area. Te frst non-invasive surveys carried out in Mustis have demonstrated the usefulness of magnetic and electric methods in mapping the pre- served remains both inside and around the city. Te ob- tained results enabled elaborating a strategy for the work to come. It is quite probable that the magnetic method will prove capable of indicating places where vestiges of constructions are preserved, while the electric method will determine the depth and conditions of deposition of localised structures. Keywords: archaeology, Tunisia, Mustis, non-invasive surveys, geophysical measurements, aerial photography, topographic measurements (archéologie, Tunisie, Mustis, prospection non invasive, prospection géophysique, photogra- phie aérienne, levés topographiques) La recherche du site archéologique de Mustis est menée par le Centre Polonais d’Archéologie Méditerranéenne et l’Institut d’Archéologie de l’Université de Varsovie dans le cadre de l’accord scientifque signé en 2016 et 2019 (pour une durée de trois ans avec possibilité d’extension) entre l’Institut National du Patrimoine de Tunis représenté par le directeur N. Kallala et F. Mahfoudh, et l’Université de Varsovie représentée par le recteur M. Pałys. L’accord prévoit la possibilité de mener des recherches archéologiques interdisciplinaires en Tunisie.